Adjustable illuminating device for hydrometers



Sept. 11,- 1934. G R CARLSON 1,973,140

ADJUSTABLE ILLUMINATING DEVICE FOR HYDROMETES Filed Oct. 11, 1933 2Sheets-Sheet l Attom Sept. 11, 1934. GR, CARLSON 1,973,140

ADJUSTABLE ILLUMINATING DEVICE FOR HYDROMETERS Filed oct. 11, 193s 2summa-sheenl 2 ff f/ fd ff I 'nventm' Patented Sept. 11, 1934)imperia-aria rLLUMENA'rrNGDEVrC Foa HYDROMETERS, ,l Gesta RichardCarlSenQMet'uchen, N. J. 1 Applicants ost-steif lr1, A1933, serai No.693.150

` screams. (ci. 24o-6.4)

This inventionl relates to a structurally refined and appreciablyimproved self-contained illumidicating tubes or" hydrometers and thelike, particularly the type used for testing water in automobileradiators. f f lThese hydrorneters are generally of the duplex type,that is, are provided with spaced parallel graduated tubes. In someinstances, a single graduated glass gauge tube is employed. The singleglass tube idea is shown in 'the' hydrometer .depicted in apatentgranted to me under number 1,924,024, August 22, 1933.

ble or duplex style of hydrometer is shown in the present application. vIt follows that the present applicationincludes an improved adjustabletype illuminating device which may be used either with a single ordouble tube hydrometer. In the previous patent re- 2'0 ferred to, itwill be observed that the illuminating device, in which the novelty isclaimed,f comprises a block-like body formed with a socket constitutinga receptacle for a 'dry cell battery, said lbody serving as a supportfor a bulb and being fashioned with a semi-circular recessinone'longitudinal edge dening a reiiector for the bulb. f Suitablemeans is provided for conveying the cur- .rent from the battery tothe'bulb and the body is provided with upperk and lower clamps or clipsadapted to embrace thegauge glassof the hydrometer in such a manner asto permit the beam Vof light to .be thrown on the'tube to facilitatetesting and inspection. f

By comparison, it will be observed that the clevice of this applicationembodies certain of the fundamental parts above described, but includesa double clip or clamp unit having upper and lower arms pivotallyfastened to the illuminating device so as to permit the latter; deviceto be angularly adjusted with respect to the hydrometer to permit thelight beam to be adjusted for more accurate and convenient inspectionand gauge reading purposes.

Other features and advantages will become more readily apparent from thefollowing description and drawings.

In the drawings:-

Figure 1 is an elevational view of a conventional double typehydrometer, showing the adjustable illuminating device associated withthe smaller gauge glass or tube.

Figure 2 is a horizontal sectional view taken approximately on the planeof the line 2-2 of Figure 1.

Figure 3 is a View similar to Figure 2, showing a Awith 4a single tubeor glass -hydrometer. nating device for use in association with uid in-By contrast, the douv'of'two different styles or forms of attachingunits for the illuminating devices.

4threaded socket 17 centrally located to take care slight modification,such Iasis usedginconnection Figure 4 is a viewin section and elevation,showing lthe complete attachment with'its parts in assembledrelationship to disclose the specific details.

Y Figure 5 is a section on the line 5-5 of Figure 4.

Figure 6`fis a view showing a detachable extension tube adapted toaccommodate an elongated dry Ycell battery whenever the latter type ofbat- :L

-tery is-needed. f l i i Figures 7 and 8 are perspective detail vieWs.y'I'he hydrometer shown in Figure l, which is a- `conventional automobiletype, embodies an upper mounting 9 carrying the rubber bulb 10 and alower mounting 11 carrying a nozzle 12. The

customary-transparent graduated glass tubes,

which are arranged in spaced parallelism,`-are mounted between' thesetwo so-called mountings 9 and 11.V The large tube is indicatedl by thenumeral 13 andthe smaller one by the numeral 14.

Incidentally, the invention, as before indicated, 'is intended Vto beused either on the single or doubletype tube. This necessitates theprovision I will describe first the illuminating device perse, since itis usable connection with either type of attaching unit.

yThis device comprises a casing designatedl as a unit bythe numeral 15.'As shown in Figure 4, the

"casing is of general rectangular formyand one longitudinal edge isformed with a substantially 'semi-circular depression or recess llbwhichdefines a reflector. This is formed with-a 'screw vof 'the' electricbulb 18.The casing includes'fa .cylindrical chamber or receptacle 19open atone -end and internally screw, threaded at.-this` end to`accommodate ar'emovable screw plug orJ cap 20.

dry cell 21. Obviously, by screwing in on the .plug ,105

20, the circuit can be closed for illuminating the bulb and the rays oflight will be projected by the reflector surface 16. Fundamentally, thisis somewhat the same as the corresponding device illustrated in Patent1,924,024, previously mentioned. 1,10

By strict comparison of the present battery and light holder with theprevious patented type, it

will be observed that certain structural distinctions exist. Forexample, the open end of the re- `ceptacle 19, which serves as acontainer for the battery,` internally screw threaded to accommodate thecap 20. This also serves -to accommodate the screw threaded end of anextension Y tube 25which, as shown in Figure 6, is used sometimes toprovide an elongated receptacle for a longer battery. The outer end ofthis tube 25 is internally screw threaded, as indicated at 26, to

accommodate the same plug or closing cap 20. This is one improvement.

The second improvement is predicated upon the construction of the casingwhich permits it to be pivotally and adjustably connected with theattachingunit 27. For example, as. shown inFigure 5, it will be observedthat above and below the reecting surface 16, the casing is formed' withkaccommodation or adaptor slots 28 and 29. Moreover, the top and bottomwalls 30 and 371 of the casing areiapertured to accommodate pivot and'clamping screws 32 provided with finger grips 33. Thesey screws notonly serve as pivots to provide a pivotal connection between theilluminating de- ,vice 15 and the attaching device 27, butv also as.locking members so as to permit the two parts to be xedly connectedtogetherwhenever circum- 30 stances require it. By pivotally connectingthe casing with the attaching unit 27, theA casing. can be adjusted onthe arms 37 so as to direct the light -rays from the lamp i8 against onetube of the .hydroineten` whilethe device is attached to the 1,35 othertube thereof. n

The. attachingclamp or unit 27 is designed for use in connection withthe small tube. 14. Inasmuch as some hydrometers include only thesinglelarger tube 13, it is necessary to use a'slightly different formof attaching clamp or unit 34. Structurally, both of these parts 27 and34 are kthe same, with the exception of their proportions. 'Iherefore,va description of one will sufiice for both, it being observed that eachunit or device comprises a pair of upper and lower'springclips v adaptedto embrace the glass tube, these clips being joined together for thesake of rigidity by a tie bar or connecting strap 36.. Upper and lowerarms 37 of aduplicate type are attached to the clips and extend insuperposed spaced parallelism through the aforesaid slots 28 and 29. Theinner ends of .these arms, areA screw threaded to accomrnodate thethreaded locking and pivoting studs 32..A Obviously, by loosening thethunrbwheel 33, ,155 `the two parts 27 and 15 are pivotally joinedtogether andl by tightening the studs 32., said parts f can be virtuallylocked together to move as a So far-.as the diiference in constructionbetween` the two unitsv 27 and 34 is concerned, the

only principal difference is that the clips inthe device 34 shown inFigure 3 are slightly larger to engage the tube 13. In Figure 2, theyare somewhat smaller to engage the tube 14. Likewise, it has been foundadvisable to shorten the arms 37 in the type of unit 34 illustrated inFigure 3. As before stated, both units are fundamentally the same inthat each one comprises upper and lower spring clipsl tied together andprovided with arms pivotally and adjustably connected with the slottedportion of the casing 15.

The gist of the invention is the provision of a double clip attachingunit adaptable Vto the tubes 13 and 14 with a light and battery carryingdevice or casing 15 pivotally and detachably connected with the arms 37of the unit. The two units 34 and 27 are interchangeable, but basicallythe same in construction.

It is thought that the description, taken in connection with thedrawings will enable a` clear understanding of the invention to be had.Therefore, a more lengthy description is thought unnecessary. y

While the preferred embodiment of the invention has been shown anddescribed, it istobe understood that minor changes coming withinA theneld of invention vclaimed may be resorted to, if desired.

l. In a structure: of ,the class described, a battery illuminatingdevice comprising a casing ifncluding a battery receptacle, a reflectingsurface,

,a bulb associated with said surface', the reflecting ably, pivotallyand detachably connecting the' cas- 4120 with said arms;

2. An illuminating device for hydrometers of the double-tube typecomprising a supporting unit including springV clamps forengagin'g` onetubel of the hydrcmeter, supporting arms. carried by the clamps, airilluminating device including a `bulb v I and. reflecting means,and..means for pivotalfly connecting said device to' the free ends ofisaid arms, whereby the device can be adjusted to direct the rays oflight from the bulb upon. the other 130 tube, and means for locking thedevice. irradjusted position to the unit. f

- Giosfrit RICHARD Crimson.

